b-u bbb bbk bbn bbt bbu bkb bkk bkn bkt bnb bnk bnn bnt bnu btb btk btn btt btu bub buk bun but buu k-t kbb kbk kbn kbu kkb kkk kkn kkt kku kn- knk knn knt knu ktb ktk ktn ktt ktu kub kuk kun kut kuu nbb nbk nbn nbt nbu nkk nkn nkt nku nnb nnk nnn nnt nnu ntb ntk ntn ntt ntu nub nuk nun nut nuu tbb tbk tbn tbt tbu tkb tkk tkt tnb tnk tnn tnt ttb ttk ttn ttt ttu tub tuk tun tut tuu ubb ubk ubn ubt ubu ukb ukk ukn uku un- unb unk unn unt unu utb utk utn utt utu uun uut uuu